g The Drosophila melanogaster genome contains approximately 24 million bases of exon sequence, 20 million bases of intron sequence, and 76 million bases of intergenic sequence. Calculate and compare the percentages of exon and intron sequences in Drosophila melanogaster genome to that of the human genome.

When it is compared to the human genome, the Drosophila melanogaster genome contains a higher proportion of exons (20%) and a minor proportion of introns (16.6%).

Explanation:

The Drosophila melanogaster genome contains 24 million bases (Mb) encoded by exons + 20 Mb introns + 76 Mb intergenic sequences = 120 Mb >>

- Exon sequences= (24 x 100)/120: 20 %

- Intron sequences= (20 x 100)/120: 16.6 %

- Intergenic sequences= (76 x 100)/120: 63.3 %

On the other hand, the completion of the human genome sequencing showed that only 1.1% encodes proteins (i.e., they are exons), 24% are introns, and 75% are intergenic sequences. Moreover, it is also important to highlight that the D. melanogaster genome contains about 13,000 protein-coding genes, while the human genome contains nearly 22,000-30,000 protein-coding genes.

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